The positive thing is that it looks like the Kindle Touch won't be abandoned by Amazon, after all... The negative is that they want to prevent users from getting all the benefits of the excellent software developed here...

Yes, they do. They care to close all the jailbreak vectors - even the ones which aren't security threats in any way - , and they care enough to re-obfuscate their code in worse and worse ways with every version.

Where did they get to know about the jailbreak vectors in the first place? Whom are they directly attacking by willingly rendering all our previous efforts useless again and again? Do you have any other explanation for these measures except for a huge "FUCK YOU, developers"?

Well, bit the bullet, uninstalled jbpatch and updated my touch. It seems quite snappy with all the new stuff. As the files show the fonts are still the same as 5.1.x ones. But luckily the /font and ;fc-cache still works to replace the internal Caecilia font with new ones without any file replacement on the device (verified by before-after screenshot and my eyes ).

Edit: PDF viewing and scrolling while zoomed seems to have improved a lot.

Maybe they're simply planning to sell enhancements like those you made. I guess that mainsream users would pay for hyphenation, margin resize, multiple dictionary lookup and all the other patches you created.

i've upgraded to 5.3.2, found it amazing... the search is really improved, the old one was just awful... but the thing i'm really, REALLY missing is the modified margins... i had lot less margins in previous configuration and really get used to read that way. The experience isnt the same

i'm no developer but i hope the amazing devs we got here will get to break the new firm

what should I disable before upgrading ?
I have jailbreak + usbnet (iptables opened for ssh over wifi) + jbatch
(+ changed one shortcut, ie. one market is shortcut to browser - found it somewhere here)

Of course I will wait till the jailbreak devs had a look as I've grown rather fond of and dependent on all the JBPatches (especially custom font sizes) and USBNet (because the framework keeps breaking itself ), but I am so stoked for this .

Thank you very much Amazon ! (even if you locked this one down, which the devs can jailbreak anyway ... )

(Seriously guys ... yes, Amazon [edit] over jailbreaks sucks, but I still appreciate this update, alright? I just hope they'll let the last remaining PW jailbreak vector be. Please, Amazon? It would be to everyone's benefit in the long term if you just let the devs do their awesome thing, alright? )

what should I disable before upgrading ?
I have jailbreak + usbnet (iptables opened for ssh over wifi) + jbatch
(+ changed one shortcut, ie. one market is shortcut to browser - found it somewhere here)

Jailbreak + usbnet is ok. I don't know about jpatch. I had some files modified manually that where preventing the update, as installer checks md5 sums of the files it is going to update. I compared checksums with ota list (attached) and found culprits.